Air mattress



FIG. 1 is a top, left and side perspective view of an air mattressshowing my new design;

FIG. 2 is a top view thereof, the bottom view being a mirror imagethereof;

FIG. 3 is a left end elevational view thereof on an enlarged scale;

FIG. 4 is an enlarged side view thereof, the opposite side being amirror image thereof;

FIG. 5 is an enlarged sectional view taken along line 5--5 of FIG. 2;

FIG. 6 is an enlarged foreshortened sectional view taken along line 6--6of FIG. 2; and

FIG. 7 is a right end elevational view thereof on an enlarged scale.

The ornamental design for an air mattress, as shown and described.